RT Journal Article
T1 Valorisation of Metallurgical Waste for Inorganic Pigments Production
A1 Paz Gómez, Daniela Carolina
A1 Vilarinho, I. S.
A1 Carvalheiras, João
A1 Pérez Moreno, Silvia María
A1 Seabra, Maria Paula
A1 Labrincha, João António
A1 Bolívar Raya, Juan Pedro
AB Four industrial wastes, namely, tionite (T), iron grit (IG), electroplating sludge (ES), and mill scale (MS), are typicallydisposed of in controlled hazardous landfills because of their toxic content, posing potential harm to human health andto the environment. At the same time, the chemical composition of these wastes, specifically the nature and content oftransition metals, makes them potentially attractive for reuse in pigments manufacturing. This work details the study ofthese residues for producing coloured perovskites to be tested as inorganic pigments. The residues were mixed, in differentproportions, and subsequently calcined to produce the required structures. The colouring potential was then assessedin a ceramic paste and in a transparent glaze. Leaching tests were carried out to verify the effective immobilisation ofthe hazardous species. Dark pigments were successfully obtained from the mixtures of T: ES: Co3O4, T: MS and T: IG.The crystalline phases present in T: ES: Co3O4 are nickel–chromium iron oxide spinel–Fe1.5Cr0.5NiO4 (without Co) ortrevorite–Fe2NiO4 (with Co), titanium nickel oxide–TiNiO3 and titanite–CaTiSiO5. The mixtures T: MS and T: IG presentedhematite (Fe2O3) and pseudobrookite (Fe2TiO5). Leaching tests confirmed the non-hazardous or inert character ofthe synthesized pigments. Products showed brownish or greyish hues, depending on the pigment added. T:75ES_1100,T:73ES:2Co_1100, T:75MS_1000, T:75MS_1100 and T:75IG_1000 pigments can effectively and safely be used to colourceramic paste replacing partially or totally the commercial pigments
PB Springer
SN 1877-2641
SN 1877-265X (electrónico)
YR 2024
FD 2024-06
LK https://hdl.handle.net/10272/24298
UL https://hdl.handle.net/10272/24298
LA eng
NO Paz-Gómez, D. C., Vilarinho, I. S., Carvalheiras, J., Pérez-Moreno, S. M., Seabra, M. P., Labrincha, J. A., & Bolívar, J. P. (2024). Valorisation of Metallurgical Waste for Inorganic Pigments Production. In Waste and Biomass Valorization. Springer Science and Business Media LLC. https://doi.org/10.1007/s12649-024-02629-7
NO The authors gratefully acknowledge Huelva University for providing the waste and the collaboration with the Department of Materials Engineering of the University of Aveiro, Portugal.João Carvalheiras (SFRH/BD/144562/2019) wish to thank Fundaçãopara a Ciência e Tecnologia (FCT) for supporting their work.This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020,UIDP/50011/2020 & LA/P/0006/2020, financed by national fundsthrough the FCT/MCTES (PIDDAC) and it has been also funded bythe project ENFRIMA (UHU-202020).Open access funding provided by FCT|FCCN (b-on)
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026